Means for molding a fin into a casting



Feb. 8, 1927. 1,616,626

T. F. HUGHES MEANS FOR MOLDING A FIN INTO A CASTING Filed May 28, 1924 Patented l Feb. `8, 11927.

[relatief maar THOMAS P. HUGHES, or PAW'rUCiti-3T,y iaHonEfIsLANn; ASSIGNOR ToUNirEnWIRE AND SUPPLY COMPANY, lor AUBURN, RHODE iSLANn'A CORPORATION OP airone AISLAND.V i

`Application filed Mai ze,

The object of this invention is to provide means and also a method of applying a heatprotecting strip of metal or material of relatively-high .heat-resisting qualities' to the edgeof a strip or sheet of metal having relatively lower heat-resisting qualities. and

molding a. casting about the protected or.

inclosed edgeV ofthe strip or. sheet.

' l/ViththeSe and Other objects in view, thel loainvention consists of certain'novel features of constructiomas will be more. fully described,.and particularlyfpointed, out. in .the p appended claims. y 'r- In the accompanying drawings:

ing material as applied to theV edge of a strip or sheet of lrelatively-low-heat-resisting material. n, l

Figure 2 isa detail showing a length of the channel-shaped strip. Figure .3 is-a perspective view showing. a

length of the strip' or sheet of relatively- ,low-hezit-resistingimaterial,vi i 25.' Figure ,4 is a view showingdeeply-corrugated rolls for roughening theinner surfacesV v.ofthe .channeled4 strip and .forcing these surfacesfinto the, corresponding surfaces ,of the relatively-softer metal. Y

Figure 5 is an enlarged` .sectional-elevation illustrating the roughened, inner sur-l faces of the sid-e walls of the Y channelshaped strip as imbedded into the corresponding indentationsin the surfaces vof a relatively softer metal.` 4 y j Figure i6 is a sectional view. which shows a portion of a cylinder into the outer surface of which is molded the protecting edges of the heat-radiating fins.V` Y 1 It is found in practice of radvantage to mold a pluralityof strips or fins of heatradiating material edgewise and in spaced Figure l isa perspective view illustrating a channel-shaped strip of.,high-heat-resist MEANS POPQ-MOLDlNG A FIN VNro A' CASTING.

1924. serial Naviaeve.

.case or cover these edgesivof theiiins in .channeled member of relatively high heat resisting materialswhich protects the cop-` per andprevents it'from melting upon` being .Y

mounted into` the .cast-ing.v

Y.' Further, in Vsomeinstanc'es, in order to firmly: secur-e the channel=shaped member to y the edgeV of the copper, l corrugate or lotherwise..roughenthe'inner surface of the' ,side 'Y wallsof the channel and forcethese roughened sur-faces into'the softer metal byy lpressure, while instill other cases-beforell apply i Y the `channel .strip to theledgeof the copper, .I insert a rstrip/of solderinggmetal into the channel 'member .and when. `the castV metal is-molded about .the incasing edge of the fin this solder which is of'a `low', melting quality l n solders the copper to the channeledmember f i thus firmly securing the llin inthe casting;-

and the .following iS a :de-tailed descrip-v tion of the present. embodiment-.of my Vith reference it is impractical `tor mold the' edge yof this strip of copper directly into they outer surface of the cylinder 11,v it has been foundf of advantage to incase or insert the edge of the copper, which has to be molded into the cylinder, in a protecting material and to. perform this protecting function I preferably employ a strip of steel and form the same into channel shape asat 12, the Side walls 13 and 14 of this Strip being spaced to just receive the edge of the copper strip to the drawings, lO designates thel strip of sheetroopper. which/may be preparedl for use as a heat-radiating fin. for a so-called air-cooled cylinder. and. asv

between-them and in order to rmly secure.

this channel stripto the edge of the copper, I, lin some cases, first posit-ion the copper strip into the channel and then. pass this covered edge through a set` of knurling or corrugating rollsV l5 which` serve toindent or roughen the 'side walls-"of the channel member both on' Vtheir outer faces Aand also on the inner faces, the rroughened or corrugated .inner facebe-ingforced into the correspondingly Shaped surface ofthe softer metalV 10 thereby securely locking the two metals together, the outer roughened surface also serving to receive the molten metal and securely locking the fin in the cylinder.

In other cases, instead of passing. this protected or steel covered edge of the copper through the rolls 15, in order to force and lock the channel member onto the copper, I insert a strip of soldering metal as at 16 into the channel member before the edge of the copper is positioned therein and then upon subjecting this edge tothe heat of the molten metal of the casting, this strip of solder is fused and solders and so locks the copper to the steel and as the steel is held firmly in the cast metal the Whole is locked together Without the necessity of corrugating or roughening the surfaces of the channel member in order to lock the same to the copper. n

I do not Wish to be restricted to the applying of these channeled members to heatradiating fins as 'the saine may be applied to the edges of Vsheet copper to be used for any other purpose. Y

Having thus described lone illustrative embodiment ofmyinvention and the best mode known to me for carrying out my method, I desire it to be understood that although specific terms are employed, they are used in a genericand descriptive sense and not for the purpose of limitati'omthe scoperof the invention being defined and limited only by theterins of the appended claims. Y

I claim: v

l. A heat-radiating iin adapted to be positioned in a' metal casting comprising a metal strip, and a protecting member attached along theV edge thereof of a material having a relatively higher fusingpoint than the lmetal strip.

2. A heat-radiating lin adapted to be positienedV in a metal casting comprising a metalvstrip anda protecting member attached along each side thereof adjacent its edge of a material having' a relativelyhigher fusing point than the metal strip.

3. A heat-radiating fin adapted to be positioned-in a metal casting comprising a t meta-l strip and aV protecting member 'attached to the edge and eachv side of the strip adjacent thereto of a'inaterial having a rela.- tively higher fusing point than the metal strip; i

Ll. A heat-radiating fin adapted to be positionedin a metal casting comprising a metal strip, -a cliannel-shaped heat protectG ing member of a relatively high fusing point, attached to its edge, said member being of a material having .al relatively higher .n fusing or. casting.

point than said metal strip 5. A heat-radiating fin adapted to be po-, A

Vsitioned in a metal casting comprising a Vpoint attachedto its edge, said member being of a material having a. relativelyV higher fusing point thany said metal strip or casting and having rough inner and outer surfaces for friction nengagement with said strip and casting.

In testimony whereof I vaffix mysignature.

THOMAS F. HUGHES. 

